• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

What Ocatane Do You Use?

ExpertAdviceMan

ExpertAdviceMan

New member
So, I recently got my GTP and was reading the manual, and it says "If your vehicle has the 3800 Supercharged V6 engine (VIN Code 4), use premium unleaded gasoline with a posted octane of 91 or higher for best performance."

Now I've only been using 87, should I switch to 89 or 91, or just stay with 87?

What are you guys using?
 
Last edited:


Well I'm nearing empty, I'll be sure to throw in premium. Should I go 89 or 91? I think there's a gas station near me that just got 94...
 
Even completely stock you should be running the highest you can. Either 91, or 93 depending on where you live.
I run nothing but 93 in my car.
 


series III's compensate a bit better for lower octane than prior series, but not for too long....you just bought the car, would hate to hear about premature detonation.....run at least 91 while completely stock.....
 


I guess i should point out though that does require a tune and sometimes larger injectors depending on pulley size ad other mods
 


I let a friend use my car once...he filled it with 87
THE worst it ever ran.....like totally something wrong bad.
I have different friends now.
end of story
 
I wouldn't even know where to buy 91 around here. All there is is 87, 89, and 93. No ethanol either. I could just throw an ear of corn in my gas tank lolol
 
So, somehow, someway or another... You figure your manual is wrong in some aspect with what octane the (S/C) engine runs on? Great! I'm wondering why you didn't ask if its ok to run diesel? Lol... Just kidding...

91 or better if available, or accept the consequences IF and when they come. You might be lucky, or not...

but in an emergency you could put a quarter tank of crapola in there to get home, just make sure you stay out of boost. Then fill it with 91+.

good luck with car : )
 
You must log in or register to reply here.
Back
Top